Using Simulink    

Finding the Library Block for a Reference Block

To find the source library and block linked to a reference block, select the reference block, then choose Go To Library Link from the Link options submenu of the model window's Edit or context menu. If the library is open, Simulink selects the library block (displaying selection handles on the block) and makes the source library the active window. If the library is not open, Simulink opens it and selects the library block.


 Breaking a Link to a Library Block Library Link Status